Coin-controlled liquid dispensing apparatus



Sept. 11, W45. J. M. ALEXANDER COIN CONTROLLED LIQUID DISPENSINGAPPARATUS Filed Seph. 2, 1941 s Sheets-Sheet 1 w w 2 a 3, z w n mm M 2 H2 2 m a p\ I a 3 l 9 \W F u Q 0] T 8 Z H 6: 8 m. 5 l- 8 2 Tw m u L 0 N oE I o Q 2% n K w w M A m Woo 0 a z \1. W1 .1. 65% Z a o w \l a? 2 a 3 Zu 5 5 53 Z n W A 5 5 A 5 2 w mgz INVENTOR.

John. M. Alexa-1161.31 BY 7M 2."

Aiiornef Sepi. H, 1945. J. M. ALEXANDER COIN CONTROLLED LIQUIDDISPENSING APPARATUS Filed Sept. 2 1941 5 Sheets-Sheet 2 4w a as m MINVENTOR. John. M..A1xam 1av AHorney" Sept. 11, 1945. J. M ALEXANDERCOIN CONTROLLED LIQUID DISPENSING APPARATUS Filed Sept. 2, 1941 5Sheets-Sheet 3 IN VENT OR. John. M. Aluxamanv wow mom 0 SN m EN EN F x44 Anon Leg" Sept. 11, 1945. J. M. ALEXANDER COIN CONTROLLED LIQUIDDISPENSING APPARATUS Filed Sept. 2, 1941 5 Sheets-Sheet 4 Omr INV EN-TOR.

M. M m x m M M J wou Sept, H, 1945. J. M. ALEXANDER COIN CONTROLLEDLIQUID DISPENSING APPARATUS 5 Sheets-Sheet 5 Filed Sept. 2 1941 II II HII II II I lll\|l II II lllll INVENTOR. John. M. Alrzxanler Aiiorney"Patented Sept. 11, 1945 COIN-CONTROLLED LIQUID DISPENSING TUS APPABAJohn M. Alexander, Lincoln, Nebr.

Application September 2, 1941, Serial No. 409,213

18 Claims.

The present invention relates to a coin controlled liquid dispensingmechanism and more particularly to one in which the flow or liquid isstopped by the operation of a preselector mechanism and in which thepreselector mechanism is automatically set by the insertion of one ormore coins.

It has been proposed to provide a gasoline vending machine wherein apreselector mechanism is gradually retracted by a subtracting mechanismand is operative to shut off the flow of gasoline and terminate theoperation of the gasoline pump motor when the amount of gasoline whichhas been dispensed corresponds to the original setting of thepreselector mechanism. In certain types of such machines, thepreselector mechanism was set by hand. This led to the disadvantage thatthe operation of the pump still required the attention of an attendantto be sure that the preselector mechanism was correctly set. It was accordingly further proposed to provide arrangements for setting suchmechanism manually in which the extent of the setting permitted wasdetermined by the value of the inserted coin. With such arrangments, ithas been impossible to provide adequate slug detecting mechanism.

Furthermore, the setting operation, due to being associated with theoperation of inserting the coin, often necessitated the exertion ofconsiderable efiort upon the operator.

An object of the present invention is to provide in a coin controlledliquid dispensing mechanism having a preselector mechanism forterminating the liquid dispensing operation when the amount of liquiddispensed equals the original setting of the preselector mechanism,motor means for automatically setting said preselector dial inaccordance with the value of one or more coins inserted therein.

A further object of the present invention is to provide such adispensing machine in which a motor is at all times disconnected fromthe preselector mechanism when the motor is not in the process ofsetting the same so as to permit free retraction of the preselectingmechanism by the subtracting means as the liquid is dispensed.

A further object of the present invention is to provide such anarrangement in which the subtracting means is effective to retract thepreselecting mechanism at uniform predetermined increments and in whichthe motor is effective to advance said preselecting mechanism byincrements of the same amount or multiples thereof.

A further object of the invention is to provide such a liquid apparatusin which a solenoid and pawl are employed for advancing the preselectingmechanism and in which the solenoid is energized a number of times equalto the value of the inserted coin divided by a monetary sum equivalentto the uniform increments by which the solenoid and pawl advance themechanism each time the solenoid is energized.

A further object of the present invention is to provide in conjunctionwith the mechanism previously described, novel means for effecting theperiodic energization of the solenoid a number of times corresponding tothe value oi the inserted coin.

A still further object of the invention is to provide such a means forperiodically energizing the solenoid which comprises a plurality ofdisks, one associated with each coin passage, and designed to causeactuation of switching means a number of times corresponding to thevalue of the coin.

'A still further object of the invention is to provide an arrangement.such as is set forth in the last paragraph in which the disks act topropel A still further object of the invention is to providefanarrangement such as set forth in the second preceding object in whichthe disks comprise a plurality of switch actuating pins, the number ofsuch pins corresponding to the value of the coin.

.A further object of the invention is to provide an arrangement in whicha motor associated with the preselector mechanism is continuouslyenergized upon the insertion of a coin until the motor has driven thepreselector mechanism to a position corresponding to the value of thecoin.

A still further object of the present invention is to provide anarrangement suchvas is set forth in the last paragraph in which anelectrically operated clutch is efiective to connect the motor with thepreselecting mechanism only when the motor is energized.

Other objects of the invention will be apparent from a consideration ofthe accompanying speci-' fication, claims, and drawings, in which:

Figure 1 is a front elevational view of my improved dispensing meanswith a portion of the front cover removed to show the relation ofvarious parts;

Figure 2 is a side elevational view of the dispensing machine, also witha portion of the cover removed; v

Figure 3 is a schematicview showing the relationshlp of the variousnovel elements of my ap- P 1 Figure 4 is an elevational view showing themechanism of one form of the motor means for advancing the dial of thepreselecting mechanism;

Figure 5 is a view, largely schematic, of the mechanism for periodicallyenergizing the motor means of Figure 4;

Figure 6 is a transverse sectional view of a portion of the mechanismshown in Figure 5;

Figure '7 is a schematic view of a modified form of a mechanism foreriodically energizing the motor of Figure 4;

Figure 8 is a modified form of motor means for setting the preselectordial.

Referring to Figures 1 and 2 in which the general organization of theliquid dispensing apparatus is illustrated, the reference numeral Iindicatesa base supporting a casing I2. Mounted within the casing is apump I3, the suction side of which is connected to a pipe I4 leading toa suitable source of liquid supply such as an underground tank ofgasoline (not shown). The outlet side of the pump is connected to pipingI which is connected to an air separator IS. The outlet side of the airseparator is connected at H to the inlet side of liquid meter I8. Theoutlet of meter I8 is connected by pipe III to visible gage 20. This, inturn, is conncted to a pipe 22 leading to a hose (not shown).

The pump is adapted to be operated by means of a motor 25, said motorbeing connected by means of a belt 26 and pulleys 21 and 28 to the pumpI3. Associated with the motor 25 is a switch 30, which switch isactuated by rod 3|. The rod 3| is, in turn, connected to a bell cranklever 32 pivotally mounted in the casing at 32. The lever 32 has adownwardly extending arm 34 in the path of a push button 35 extendingout!- 7 wardly through the casing. If the lever is not restrained frommovement by any of the various means to be described later, the inwardmovement of push button 35 tilts the lever 32 in a counter-clockwisedirection (as viewed in Figure 1) to cause actuation of rod 3| in switchclosing direction.

Connected to and driven by the meter I8 is a meter shaft 38 which, inturn, is connected to a variator 39, such as shown in the patent to SlyeNo. 2,111,996, granted March 22, 1938. Such a variator is employed fordriving the price wheels of the register commonly used on pumps of thetype with which the present invention is primarily concerned. Suchregistering mechanism is indicated in connection with the presentinvention by the reference numeral 4I. This registering mechanism is ofthe well known numeral wheel or direct reading type. It includes a lowerbank of numeral wheels for registering the gallons as they aredispensed. The registering mechanism M is housed in a casing withwindows in the above Slye Patent No. 2,111,996 is provided with priceindicating wheels which are visible through a pair of windows, onlywindow 41 of which is shown. Also associated with the registeringmechanism is a pair of amount indicating wheels. These wheels are drivenby the variator 2,as4,sas

mechanism at a speed with respect to the gallon indicating wheels whichis dependent upon the setting oi the variator. This setting, of course,is determined by the price. The amount indicating wheels are visiblethrough oppositely disposed windows, only window 40 of which is shown.

The registering mechanism is provided in the conventional manner withaareset shaft 02 which is designed to be actuated by a crank 52 on theoutside of the casing. The action of this reset shaft as far as theregistering mechanism is concerned, is entirely conventional. when thereset shaft is rotated through an angle of 360, then 45 further, andthen back to the 360 position all oi the registering wheels, with theexception of the 'price wheels, of course, return to the zero position.The reset shaft is connected at its end opposite the crank 53 to aninterlocking mechanism 54 which has a depending arm 55 designed tointerengage a portion of the bell crank lever 22 and prevent actuationof the bell crank lever to close the switch 30 if the wheels of theregistering mechanism are not in the zero position. Such interlockingmechanisms are well known and a detailed description and showing isdeemed unnecessary.

Further associated with the registering mechanism is a preselectingmechanism generally indicated by the reference numeral 80. Thispreselecting mechanism is employed to control the operation of a valve8| interposed in the line I0 between the outlet of the meter I8 and thevisible gage 20. The valve 8I is a two-stage valve comprising two valveswhich are serially closed and opened upon rotation of a valve actuatingshaft 84. Thus upon rotation of valve actuating shaft 84 in valveclosing direction, a main valve is first closed to reduce the flow to aminimum value permitted by a small-flow valve. Upon further rotation ofthe valve actuating shaft 04, this small or bleed valve is closed tocompletely terminate flow of fluid through valve 8 I. Inasmuch as suchvalves are old in the art, it is believed unnecessary to specificallyshow the details of the valve.

The valve shaft 84 is positioned by the preselecting mechanism and byother mechanisms to be described. In general, the valve is automaticallyopened upon the initiation of the dispensing operation and is closedwhen an amount of fiuid has been dispensed corresponding in value to thecoin or coins inserted into the machine.

The preselecting mechanism 80, as previously explained, is employed inclosing the valve II. This preselector mechanism is initially set bycoin controlled means which forms a portion of my present invention.When the amount of gasoline that has been dispensed corresponds to theoriginal setting of the preselecting mechanism, this mechanism operatesto close the valve and interrupt the further flow of liquid to thenozzle of the pump. In general, the preselecting mechanism comprises adial I00 with suitable indicia indicating various monetary sums. In onecontemplated form, the dial is provided with numerals up to two dollarsand twenty-five cents ($2.25) in multiples of five cents. This dial I00is automatically set by any of several coin controlled mechanismsforming part of the present invention and particularly designed forsetting of the dial I00. In general, these mechanisms operate inresponse to the insertion of coins of various denominations to set thedial to a position corresponding to the value of the total number ofcoins inserted. These coin operated mechanisms. iurthermore, are adaptedfor the incorporation oi highly effective types of slug detectingmechanisms.

Thedial I is periodically retracted by subtracting mechanism to bedescribed later. As the dial reaches a predetermined position within apredetermined amount of the zero position, the valve actuating shaft 84is automatically rotated from valve open position to minimum flowposition. During this rotation, th main valve is closed, only the smallflow valve being allowed to remain open. Upon the dial I00 reaching thezero position, the valve is allowed to move to full closed position. Theuse of a. two-stage valve causes the 'final operation to be sufllcientlyslow that there is no overshooting. In other words,

when the main valve is closed, the flow of gasoline is very materiallyreduced, and the entire subtracting mechanism is operated very slowly.

While the invention is particularly concerned with the coin operatingmeans for setting a preselecting mechanism of the type briefly discussedabove, the actual details of the preselecting mechanism itself do notform part of the present invention. ,In other words, while the inventionis concerned with a method of setting such a preselecting mechanism, thenovelty is in the general combination and not in the details of thepreselecting mechanism. For example, the preselecting mechanism and thesubtracting mechanism may be of the type shown in the co-pendingapplication of Sherwood Hinds, Serial No. 309,- 502, filed December 15,1939. In order to illustrate generally the operation of thispreselecting mechanism, it is shown schematically in Figure 3, to whichreference was previously made.

In this figure, the various shafts are-indicated in dotted lines and thevarious elements carried by these shafts have been for the most partro-' tated through an angle of 90 to be within the plane of the paper.The dial I00 is rigidly secured to shaft IOI. Also rigidly secured tothe shaft IOI is a subtracting ratchet I02, a pair of cams I and I01,and a'pin disk I08. The pin disk forms part of the mechanism for settingthe dial I00 and will not be described at the present time. The shaft mlis journalled in a frame IIO. Rotatably secured to shaft IOI is a pawlcarrier plate II2. Pivotally secured to this plate and biased intocooperative relation with the subtracting ratchet I02 is a pawl I. Aspring II5 acts to bias the pawl carrier plate II2 in clockwisedirection. A lever carrying plate I" is pivotally secured to afixedsupport at II8. Pivotally secured to the lower end of this plate H1is a lever I22, the lower end of which is designed to cooperate with acam i23 secured to a shaft I24. The shaft I24 is operatively connectedto the amount indicating wheels of the registering mechanism M. In otherwords, the shaft I24 is rotated in accordance with the movement of theamount indicating wheels, th numerals of which are visible throughwindow 48. Lever I22 is pivoted at an intermediate point thereof to thelever carrier II! as indicated at I28. Th upper end of the lever E22 hassecured thereto a rod I28. The left hand end of rod I28 is in turnconnected to a pawl carrier plate II2. Secured to the upper end of theplate I". is a link I30 connected eccentrically to a disk I32. This diskis secured to shaft I34 which, in turn, is connected to the change-overlever I33. When wise position to approximately a horizontal position.the plate I" is tiltedin a clockwise direc tion sufficiently to move thelever I22 out of cooperative relation with the cam I23.

Whenthe parts are in the position shown. each rotation of cam I23 due tothe gasoline flowing vof cam I22 moves off of the cam follower portionof lever I23, the spring H5 is effective to tilt the plate II2 back in aclockwise direction to move the pawl into the next adjacent notch.

It will be seen from the above that as gasoline flows through the meter;the subtracting ratchet I02 is moved in a counter-clockwise direction.This movement, moreover, causes the movement of the shaft IOI and thedial I00 in a counterclockwise direction. At the same time, cams I05 andI01 are rotated in a counter-clockwise direction. These two cams aredesigned to control movement of the valves to minimum flow position andclosed position respectively at the desired times.

' Secured to one end ofthe valve actuating shaft 84 is a lever I40having a forked upper end. The

two legs of the forked end are designed to straddle a pin I4I secured toa triangular plate I43.

This plate-is non-rotatably secured to a shaft I44 journalled in thepreselector mechanism housing 80. A spring I45 is fastened at its lowerend to the plate I43 and at its upper end to a fixed portion I48 of thepump casing. Spring I45 serves to bias lever I43 in a clockwisedirection (as viewed in Figure 3) and hence cause counter-clockwisemovement of the shaft 84, which tends to close valve 8|. Thus the springI45 serves to bias shaft 84 in valve closing direction. Secured to shaftI44 within the case of preselecting mechanism 80 are arms I48, I49, andI50, arms I48 and I49 being integral. These arms are secured to theshaft at different angular positions as clearly evident from Figure 3.

The arms I48 and I50 are designed to cooperate with levers I5I and I52which in turn cooperate the lever I33 is in the position shown, theplate with the cams I05 and IN. Levers I5I and I52 are biased intoengagement with the cams I05 and I 01 by gravity or any suitable biasingmeans.

With the parts in the position shown, the end of'the arm I48 bearsagainst the end of lever I52 and thus restrains clockwise movement ofshaft I44 by spring I45 and hence counter-clockwise movement of shaft84. The cam I05 has an elongated toe portion I55, the forwardmostportion of which is so located with respect to dial I00 that it engagesthe cam follower portion of lever I5I just as the dial I00. reaches, thefive cent position. In other words, the ca ngtoe I55 coacts with leverI5I when an amount :within five cents of the desired amount of gasolinehas been dispensed. When the cam toe engages the lever I5I, it tilts thelatter in a clockwise, direction to move the right end thereof out ofthe path of movement of 'arm I48. This permits spring 45 to rotate shaftI 44 ina clockwise direction and hence to cause rotation of shaft I44 incounter-clockwise or valve closing direction. This rotation of shaft inis limited by 'thefengagement of arm I50 with the right hand' nd-oflever I62. The arms I49 and I60 are so placed in angular position thatthe movement of shaft I44 permitted when arm I48 is released, results inshaft 64 being rotated sufllciently to cause closure of the main valvemember while leaving the minimum flow valve member open. In other words,the valv is moved to its minimum flow position. This results in the flowof liquid through meter I8 being decreased materially so that the amountindicating wheels, and consequently the cam I23 moves at a much lowerspeed. Eventually, however, the ratchet I02 is moved to a position atwhich the numeral zero appears behind the window I03. When this appears,the desired amount of gasoline has been dispensed. At this time, the camtoe I51 of cam I61 engages the cam follower portion of lever I52,tilting this lever in a clockwise direction and thus releasing the armI50. The spring I45 is now able to rotate shaft I44 and consequentlyshalt 64 in valve closing direction to cause closure of the minimum flowvalve as well as the main valve. Valve 8| is now completely closed andall further flow of gasoline is stopped.

The arm I49, which as previously explained, is formed integral with armI48, is designed to cooperate with an abutment member I 53 resilientlycarried by a lever I56 which is connected by a link I58to a lever I59.The lever I59 is secured to shaft I34 to which is secured thechange-over lever I33. When this lever is moved clockwiseto thesubstantially horizontal position in which lever I22 is out ofengagement with cam II4, lever I56 is rotated counter-clockwise to bringthe abutment member 153 into the path of movement of arm I49. Thesubstantially horizontal position of the lever I33 is the manualposition in which the pumpis operated without in which the pivot pin I61is on a straight line between the stub shaft I62 and the pivotalconnection of rod I66 with lever I43. In this position of the segmentgear I6I, the teeth of the gear are in mesh with the gear I63 connectedto the pulley 26. Since in the normal running operation, it isundesirable to have the teeth so in mesh, means are provided to restrainmovement of the segment gear by the biasing means previously referredto. This means consists of a lever I10 which is pivotally secured at "Ito a fixed portion of the casing. The right hand end of the lever is inthe form of a hook I12 which is designed to engage the pivot pin I61 andprevent clockwise movement of the segment gear. Lever I10 is shown inthis restraining position in Figure 3. The lower end of the rod I13 ispivotally connected to an intermediate point of lever I16 as indicatedat I15. The upper end of rod I13 is connected to a lever I14. The end ofthe lever I14 opposite the point connected to the rod I13 is adapted tobe engaged by an arm I11 carried by the reset shaft 52. The reset shaft52 is moved in a counter-clockwise direction as indicated by the arrowopposite handle 53. Upon the reset shaft being rotated to reset thenumeral indicating wheels of the register 4|, the lever I14 is tilted soas to move the rod I13 upwardly. This in turn allows lever I10 to bemoved upwardly to disengage the hook I12 from the pivot pin I61. It willbe obvious that immediately upon the hook being disengaged from pin I61,spring I45 and the strain the aid of the preselector mechanism. Sincethe preselector dial I00 would, under thes conditions, be at the zeroposition in which levers I5I and I52 are both held by their associatedcams out of engagement with arms I48 and I50, it is necessary to providethis further latch to hold the valve. open under these circumstances. Assoon as the lever I33 is moved to its normal position, as shown, theabutment member I53 is moved out of the path of lever I43 to causeclosure of the valve.

Means are provided for automatically reopening the valve after it hasbeen closed. This means is operative upon the initiation of thedispensing operation. This apparatus will now be described.

A segment gear I6| is journalled on stub stafl I62 secured to thehousing of the pump I3. The

teeth of this-segment gear I 6| are adapted to mesh with a pinion gearI63 secured to the pulley '28 and rotatable therewith. Connectin meansincludinga lower'rod I65 and upper rod I66 extends between a pin I61secured to the segment gear I6I and the plate I 43.' The upper sectionof the rod I66 is bent around the variator and registering mechanism asbest shown in Figure 1. The two sections of the rod are connected by astrain release connection I66.

In general this strain releas connection is of conventional constructioncomprising a sleeve and resilient means against which the rods I65 "andI66 may be extended. The strain release connection I66 functions in theusual manner release connection I68 are effective to rotate the segmentgear I6I in a clockwise I direction to cause engagement of the teeththereof with the pinion gear I63. The apparatus is now in condition forstarting.

Upon th motor being initially energized, the pinion gear I63 iseilective to rotate the segment gear in a clockwise direction therebymoving rods I65 and I66 downwardly. This downward movement of the rodsrotates the lever I43 in a counter-clockwise direction to move the valveto open position. The valve is thereafter retained in open position bylatching arm I48 or arm I43, as previously discussed.

My invention further contemplates retaining the motor switch in closedposition as long as the valve is open and automatically closing the sameas soon as the valve is closed. This, moreover, is accomplished withoutthe use of a switch additional to the 'main motor switch. As previouslypointed out, a rod (H is operatively connected to the motor swtich 30 atone end and at the other end is connected to the bell crank lever 32. Aspreviously pointed out, an arm 55 extending from the interlockingmechanism 54 prevents the movement of the bell crank lever if thenumeral carrying wheels of the register 4| have not been reset.,Thisfeature is conventional in the prior art. I further provide anextension of bell crank lever 32 in the form of an arm I86 which extendshorizontally, then vertically, and finally horizontally again tocooperate with the catch I3I. This catch is slidably secured on asupporting plate I32 clamped between the valve 6| and the lower sectionof pipe I3. The catch I3I is suitably biased by means not illustratedinto a position in which the catch extends under the forwardly extendingportion of arm I86. The catch is designed to be actuated by arm I36carried by valve actuating shaft 84. As long as valve shaft 34 is ineither the full flow or minimum flow position, the catch 6| is held bythe biasing means under the end of arm I80. Upon the valve actuatingshaft 84 moving to valve closed position, however, the arm I98 iseffective to retract the catch I 3| to permit the lever 32 to move toswitch open position. Thus as long as the valve is open, the switch isheld in closed position. As soon as the valve is closed, however, switch30 is opened to stop operation of the pump motor.

The apparatus which has been described so far corresponds to that shownin my copending application Serial Number 393,971, filed on May 17,

1941, for Liquid dispensing mechanism. For further understanding of thedetails of the mechanism described so far, reference .is made to thesaid application. The novel mechanism of the present application willnow be described.

Referring specifically to Figure 4, a motor for setting the dial I isshown in detail. Rigidly secured to the shaft I M is a disk I08,previously referred to. This disk and the other actuating means thereforis located within a housing 200. The location of this housing withrespect to the pump mechanism is shown in Figure2. The disk I08comprises a series of pins 202. The number of these pins corresponds tothe number of notches on the subtracting ratchet I02 and the number ofnumerals on disk I00. In one form of the mechanism, I have employedforty-five pins on the disk I 00. In this form, accordingly, provisionis made for dispensing two dollars and twenty-five cents worth ofgasoline. Pivotally secured to shaft IIII is a lever 205. This lever ispivotally connected at its upper end to the stem 208 of a solenoid core201. This solenoid core 201 forms part of a solenoid 208 of conventionalform. The fixed core of the solenoid is indicated by the referencenumeral 209 and the winding by the reference numeral 2I0.- Secured tothe case 200 is a conduit 2II to accommodate wires leading to thewinding 2! 0 of the solenoid 208.

Pivotally secured to the lever 205 is a pawl 2I3. The forwardmost end ofthis pawl is notched 'as at 2I4 to engage the teeth 202. A spring 2I5extends between the pawl 2 I3 and the lever 205 and tends to bias thepawl 2 I3 in a clockwise direction into the path of the pins 202. Aspring H6 is connected between a stationary support 2i! and the lever205. This spring 2| 6 serves to bias lever 205 in a counter-clockwisedirection. In other words, the spring 2I6 tends to bias the core in adirection opposite to that in which it is moved by the solenoid. A fixedpin 2"! is secured to the base 2H! and lies in the path of a heelportion 2I9 of the pawl 2I3. As will be obvious from the drawings whenthe heel 2I9 of pawl 2i 3 engages the stop 2 I8, the pawl is rotated ina clockwise direction against the biasing action oi spring 2I5 to movethe notched ortion 2I4 of the pawl out of the path of pin 202. Thisfeature is very important inasmuch as it permits movement of the diskI08 and consequently shaft IOI without interference by the pawl 2 I3.

It will be obvious from the previous description of the structure. thateach time that the solenoid winding 2"! is energized, the movable core201 is moved to the right to rotate the lever 205 in a clockwisedirection. As soon as lever 205 has moved sumcientlv to permit heel 2I9to move away from stop pin 2 I8. the spring 2| is effective to rotatethe pawl 2 I3 in a clockwise direction to move the notched portion 2 I 4into the path of the next pin 202. As the solenoid core moves into thefixed core portion 209, the disk I08 is rotated the distance between twoof the teeth 202 in a clockwise direction. Upon deenergization of thesolenoid winding 2I0, the spring 2I3 is effective to retract the lever205 in a counterclockwise direction and at the end of this movement, theheel 2I9 of the pawl 2I3 engages the stop pin m to rotate the pawl H3 ina counter-clockwise direction out of the path of pins 202. The means forperiodically energizing the solenoid winding 2I0 in accordance with, theamount of money deposited in the machine will now be described.

Referring to Figure 5, the reference numeral 225 indicates slidemechanism for the insertion of coins, the reference characters 226, 221,and 228 designate slug detectors for thevarious denominations of coinswhich the machine is adapted to receive, and reference characters 229indicates a motor driven coin operated switch. In general, the coinreceiving slide mechanism 225 has a number of slides corresponding tothe number of denominations of coins which it is designed to have themachine receive. Each slide is adapted to introduce the respective coininto .a tube which leads to the particular slug detector designed toreceive that particular denomination of coin. If the coin issuccessfully passed by the slug detector, it passes to the appropriatechute of the coin operated switch 229. The process of actuating the coinhas started the motor of this switch and as the coin passes through themotor driven switch, one or more switches are actuated in accordancewith the denomination of the coin. For example, if the coin is a fivecent piece, the switches of the unit 229 will be actuated once. If it isa dime, they will be actuated twice, and ii a quarter, they will beactuated five times. In other words, the switching mechanism is pulsedonce for every five cents of the total denomination of coins inserted.As will be explained later, moreover, no matter how many coins of thesame denomination are inserted, the motor driven switch will eventuallypulsate the asso-- ciated switches in accordance with the total value ofthe inserted coins. The switches associated with the switching mechanism229, are electrically connected in parallel to the winding 2 I0 of thesolenoid 208 so that each time these switches are closed. the solenoidis energized to advance the disk I08 the distance between two pins.

The slide mechanism 225, as previously indicated, comprises three slidesor more as desired, depending upon the number of coins which it isdesired to have the machine receive. The construction of these slides islargely conventional. They are secured in a bracket structure 232 whichis secured to the wall 233 of the pump casing I2. Each slide 234 has anopening 235 adapted to receive a coin of the desired denomination. Whenthis slide 234 is pushed forwardly, the coin is moved inwardly toward anopening communicating with a tube. The tubes associated with the threeslides are identified by the reference numerals 231, 238, and 239,respectively. Pivotally secured to the bracket 232 is a lever 2. Theright hand end of this lever has an upstanding arm 242 which extendsinto the path of the coin placed in the coin opening .235. The slide 234is provided with a slot communicating with the opening 235. The arm 242normally projects into this slot. When the slide is moved in, in theabsence of a coin, the arm 242 merely travels along the slot and intothe coin opening 235 so that the position of lever 2 is not disturbed inany way. If a coin is in the opening 235 when the slideis pushedinwardly, however, the ennected to a lever 253.

clockwise direction. The left-hand end of lever 2 is pivotally connectedto a rod 245 which leads into the motor operated coin switch mechanism229. As will be explained later, the tilting of lever 2 in a clockwisedirection, with the resultant movement of the rod 245 upwardly causesthe motor of the mechanism 229 to be placed into operation. In otherwords, the insertion of a coin causes this motor to be placed inoperation. It is to be understood that while only one arm 242 isreferred to, lever 24f is provided with a plurality of such arms eachextending into a slot of the associated coin slide.

The tubes 231, 238, and 239 lead to slug detectors 226, 221, and 228.Each of these slug detectors is designed to test a coin of apredetermined denomination and which would normally be introduced intothe slide connected to it. Slug detectors 226, 221, and 228 may be ofany conventional form. Preferably, however, they are of the typeemploying a combination of tests including those of testing thehardness, the weight, the size, andthe conductivity of the metal in thecoin. Typical of the slug detectors which may be employed are thoseshown in the patent to Gotfriedt No. 2,073,261, issued March 19, 1937,and the patent to Frye No. 2,094,788, issued October 5, 1937. By usin aslug detector of this type, a coin is subjected to much more rigid testthan is possible when a slide type of slug detector is employed.

Slug detectors of the type which I propose to use customarily employmagnets for testing the conductivity of the coins. Where the insertedslug is excessively magnetic, it often happens that this slug isretained in the slug detector. Consequently slug detectors of this typeemploy some means for mechanically forcing the slug out of the slugdetector. In the present case, the slug rejectors for the various slugdetectors 226, 221, and 228 are actuated by plungers 25l. These threeplungers are all connected together to a single rod 252, the upper endof which is conlever and has an upwardly extending arm which is engagedby a button 254 extending through the pump casing. When button 254 ispushed inwardly, the bell crank 253 is rocked in a counterclockwisedirection to move the rod 252 and the plunger 25! downwardly. Upon suchdownward movement, any'slugs that may be retained in the slug detectors226, 221, and 228 are automatically rejected.

After the coin has left the slug detector, it passes through a passagein a connection neck 268. In this case, reference is made to Figures 1and 6. This connection neck has three passages, corresponding to thethree slug detectors and the tubes 231 to 239. The coin passes throughthe passage in neck 268 connected to the slug detector through which ithas passed.

The motor driven coin switch 229 is shown schematically in the lowerportion of Figure 5. Figure 6 is a transverse sectional view of thisswitch. A portion of the switch is also shown schematically in thegeneral schematic view of Figure 3. Referring first to the schematicshowing at the lower portion of Figure 5, the switching unit 229comprises a motor 262. This motor is of conventional constructioncomprising a rotor 263, a core structure 264, and a field winding 265.The rotor 263 is connected by means of a reduction gear train 266 to ashaft 269. Secured to the shaft 269 is a switch actuating disc 216having a spiral track 211. Also secured to the shaft 269 are three coinactuating disks 214, 215, and 216. These three discs are associated withcoin passages connecting with the slug detectors 228, 221, and 228respectively. The discs are preferably of a rubber-like material such asNeoprene," a substance which can be obtained commercially on the marketby that name. The structure associated with these discs will bediscussed in more detail later.

Referring again to the motor 264, the energizing circuit for this motoris controlled by a mercury switch 288. The mercury switch is secured toa lever 28l pivoted at an intermediate point thereof. Pivotally securedto a fixed portion of the switch housing is a lever 283. This lever asbest indicated in Figure 6 has a turned-in lip 284 which projects intothe spiral groove 21! of disk 218. The spiral is so arranged that asdisk 218 is turned in a counter-clockwise direction, the tongue 284engaged in the spiral is forced outwardly carrying the upper end oflever 283 to the left. This movement of the lever 283 is resisted by aspring 288 extending between the upper end of the lever and a fixedsupport 285. Secured to the lever is an abutment portion 281, the lefthand end of which bears against the lower end of lever 28L Thus, uponlever 283 being moved to the left, the abutment post 281 tends to rotatethe lever 28l and the switch 288 in a clockwise direction. When somoved, the switch 288 is moved to switch open position. Thus upon thedisk 218 being rotated in a counter-clockwise direction (the directionproduced by energization of The lever is a bell crank motor 262) mercuryswitch 288 is moved to switch open position in which position it isshown in the drawings. As best indicated in Figure 6, lever 283 ispivotally secured with a loose fit over a pivot screw threaded into a.post 288 projectingfrom a plate 289 forming part of the housing of themotor switch mechanism. Interposed between the pivot screw-298 andthelever 283 is a coil spring 29!. By reason of this coil spring, thelever 283 can be swung outwardly so that the tongue 284 is moved .out ofthe spiral groove of disk 218. A bar-292 is secured to a rod 293, thebar 292 and rod 293 being journalled at their opposite ends. An arm 294is secured to the left hand end of rod 293 and is pivotally connected tothe rod 245 so that upon upward movement of rod 245, the arm 294 ismoved upwardly to rock the shaft 293 and plate 292. Such rockingmovement of bar 292 which bears against the lever 283, causes the leverto be tflted outwardly thereby moving the tongue 284 out of the spiralgroove on disk 218. When this happens, a biasing spring 264 is effectiveto move lever 283 in a clockwise direction (as viewed in Figure 5) untilit engages the hub of disk 218 or some other suitable stop. Upon releaseof the arm 294, spring 29l forces lever 283 inwardly to cause the tongue284 to enter the spiral groove. The tongue is now in the spiral grooveclose to the center of the disks, however. Extending between the levers281 and 283 is a spring 291. This spring serves to causethe lower end oflever 2" to follow the path of movement of lever 283. Thus when lever283 is moved in a clockwise direction by reason of the tongue 284 beingreleased from this spiral groove adjacent the outer periphery thereof,the spring 291 is effective to rotate the lever 28l in acounter-clockwise direction to move switch 288 to its closed position.As previously explained, the rod 245 is moved upwardly each time that acoin is inserted in one of the-slides 234. Thus each time that such acoin is inserted, the rod 245 is moved upwardly to rock the lever 283and release the tongue 284 from the outermost portion of the spiral sothat the lever 283 assumes a position adjacent the innermost portion ofthe spiral. This means that the switch 280 is reclosed and remains inthis position for a predetermined period of time which is the timerequired for the tongue 283 to ride to the outermost portion of thespiral groove. This period of time is sufficient for a coin of anydenomination to travel through its coin track.

Referring now to Figure 6, it will be noted that the mechanism 229comprises a plurality of plates 289 (previously referred'to). 298, 299.300, and BM. Plates 299, 300, and 30l are all provided with integralridges to spape the plates from each other and to provide inclosurestherebetween. Between plates 298 and 289, the gear train 268, previouslyreferred to, is located. It is to be understood from the previousdescription that this gear train is connected with the motor 262 andshaft 269. Disks 214, 215, and 216 are located between the plates 298.299, 300. and 30!. The plate 299 is provided with a rib 304. The path ofthis rib is best shown in Figure 5. Similarly. plates 300 and 30! areprovided with integral ribs 305 and 306. It will be noted from Figurethat these ribs along with cooperating ribs and the disks 214, 215 and216 form passages for the coins. In each case this passage is of a widthcorresponding to the diameter of the coin. Thus the rib 304. referringto Figure 5, forms a passage of a width corresponding to the diameter ofa five cent piece. Similarlv, the rib 305 forms a passage correspondingin width with the diameter of a dime. Similarly, the passage formed byrib 308 and disk 210 is adapted for the reception of a twenty-five centpiece. In each case, the width is such that the coin in question fitssnugly within the passa e and firmly engages the disks. Inasmuch as thedisk is formed of a yieldable material, it is able to firmly engage thecoin and yet allow for any minor variations in the diameter thereof dueto wear. It will be obvious that as the disks 214. 215, and 216 arerotated in a counterclockwise direction by the action of motor 262, eachdisk will roll any coin in its associated passage through said passageat a uniform rate depending upon the speed of the rotation ,of the disk.In the case of the twenty-five cent passage. 9. coin is shown in Fi ure3 in the process of being rolled through the passage.

As the coins are rolled through the passage, they are designed toactuate switch positioning arms. Referring to Figure 5, these arms areindicated by the reference numerals 309 and 3I0. It will be noted thatarm 3l0 has three fingers 3i i, 3| 2, and 3l3. Similarly arm 309 has twofingers 3H and 3i5. The arm 309 has secured thereto a sector gear 3.This gear meshes with the gear 3l8 rigidly secured to an arm 320carrying a mercury switch 32I. The mercury switch is shown in Figure 5in its circuit open position. Upon the arm 309 being rotated in aclockwise direction, however, the arm 320 is rotated in acounterclockwise direction to move switch 32! to circuit closedposition. It will be obvious that arm 309 is so located that each timethat one of the fingers 3" or 3| 5 is pushed outwardly by the engagementof the coin therewith, the arm 309 is rocked clockwise to close theswitch. Arm 3l0 similarly has secured thereto a sector gear 32I whichmeshes with a gear 322 rigidly secured to an arm 324 which arm carries amercury switch 325.

Thus, each time that a coin engages one of the fingers 3H, 3l2, or M3,the arm M0 is rocked in a clockwise direction to rock arm 324 in acounterclockwise direction and close switch 32 5.

As will be apparent from Figure 6, fingers 3 to 3l5 project varyingdistances into the switching mechanism 229 and hence varying numbers ofthese contact with the different coins. As finger 3 extends through allthree compartments thereof, it is engaged by a coin passing through anyof the coin tracks. Finger 385 extends through only the outer ortwenty-five cent track. Finger 3 extends through the ten cent track andthe twenty-five cent track so that it is engaged by either a dime or aquarter. The fingers 3I2 and 3l3 extend only through the outer ortwenty-five cent track. Thus, a five cent piece oing through its trackcontacts only finger 344 so that the lever 309 is moved once by thepassage of the five cent piece therethrough. A ten cent piece contactboth fingers 3M and 3 so that levers 309 and 3l0 are each actuated onceto cause switches 32l and 325 tobe each closed once. A quarter passingthrough its track causes all of the fingers to be moved outwardly so asto cause switches 32! and 325 to be closed five successive times. Sinceswitches 32I and 325 are connected in parallel to solenoid 208, thesolenoid is energized a number of times corresponding to the number oftimes the fingers are engaged by the coin passing through.

It is obviously undesirable for pump motor 25 to be operated at the sametime as the switching mechanism 229 is being operated. If both the pumpmotor and the switching mechanism 229 are operated at the same time,there is a tendency for the liquid flowing through the meter l8 to causethe preselecting dial I08 to be retracted in position while at the sametime the coin passing through the switching mechanism 229 causes theperiodic energization of solenoid 208 to periodically advance the dialI08. Thus, there is one means acting to retract the dial and anothermeans acting to advanceit. Due to the fact that the solenoid is capableof exerting only a limited amount of power, this is not likely to causeserious injury. Nevertheless, it is desirable to provide some means forpreventing this simultaneous actuation of the dial advancing means andthe dial retracting means. A relay 335 is provided for this purpose.This relay comprises a relay coil 336, a relay core 331, an armature338, and a mercury switch 339 positioned by said armature. When therelay coil 331 is deenergized, the armature assumes the position shownin the drawing to which it is biased by any suitable means, not shown.In this position, the switch 339 is in circuit closed position. Uponenergize.- tion of the relay coin 336, the armature 338 is movedclockwise to move switch 339 to circuit open position. As will beexplained later, the relay coin. 336 is connected in parallel with thefield winding 265 of motor 262 and switch 339 in series with the pumpmotor 25. Thus, whenever the motor 252 of the switching mechanism 229 isenergized, the relay winding 336 is energized to cause switch 339 to bemoved to circuit open position to prevent operation of the pump motor25.

Operation of species 1 to 6 The various elements are shown in theposition assumed when the pump is in operation dispensing gasoline. Itwillv be noted from Figures 1 and 3 that fifty cents worth of gasolinehas been dispensed. this being the amount shownin theamountwlndow.Itisalsotobenotedthat the preselector dial is at the twenty-five centgasoline and fifty cents worth of gasoline has already been dispensed.The book I12 of lever I10 is engaged over the pivot pin I01 so as tohold the segment gear in the position shown in the drawing in which theteeth of the segment gear are out oi" engagement with the pinion gearI00. The switch associated with the motor 20 is held closed by reason ofthe horizontal arm of lever 02 being retained in its uppermost positionby the catch I 0|. With the switch in this closed position and with therelay 000 deenergized. a circuit is established to motor 20 as follows:from conductor I extending from any suitable source of power (not shown)through conductor 002, switch 000, conductor 0, switch 00 and conductor3 back to conductor "0, the other of the two conductors leading from thesource of power. With the parts in this position, both the main valveand minimum flow valve of valve 0i are in open position. Due to theliquid flowing through the meter, the amount dials are beingcontinuously turned and the shaft I20 coupled therewith is likewisecontinuously tuming, causing the continuous turning of the cam I20. Eachtime that the toe of the cam I20 engages-the lower end of the lever I22,this lever is rocked in a clockwise direction. The clockwise movement oflever I22 is transmitted through rod I20 to pawl carrying plate 2 so asto-cause this plate to move in a counter-clockwise direc-.

tion.. The engagement of pawl H0 with the retracting ratchet causes theretracting ratchet to be moved in a counter-clockwise direction thedistance of one tooth each time that this action takes place. The numberof teeth of retracting ratchet I02 corresponds to the number of numer-'als on dial IIO, as previously explained. Thus,

there is one tooth on the subtracting ratchet for each five centinterval just as there is one pin on disk I00 for each flve cents of theinserted money. Each time that lever I22 is rocked, to move in turn thesubtracting ratchet in a countor-clockwise direction, the shaft IOI, thedial I00, the disk I00 and the cams I00 and I01 are i all moved in aclockwise direction, the distance of five cents on the dial I00. Themovement of the disk I00 is possible by reason of the feature by whichpawl 2I0 is withdrawn from the path of movement of the pins 202. It willbe obvious that after four such advancements of the retracting ratchetin dial retracting direction, the

shaft I is caused by the biasing action of springv I00. Movement ofshaft I in a clockwise direction causes it to rotate the shaft 00 in acoun- '70 This counter-clockwise movement of shaft ,00

tar-clockwise direction (as viewed in Figure 3).

causes valve 0| to be moved towards closed position. As previouslyexplained, the movement of the shaft in this manner is limited by theengagement of arm I00 with the right hand end of lever I02. The arm I00is so spaced angularly with respect to arm I40 that when the arm I00engages the right hand end of lever I02, the main valve will haveengaged its seat thereby cutting ofl the main flow of gasoline throughthe valve. The minimum flow valve will be open, however, to permit asmall amount of gasoline to flow to the delivery hose. As a result, theoperation of I the meter is slowed down and consequently the operationof shaft I02 and cam I20 is similarly slowed down.

Upon the next revolution of cam I20, the subtracting ratchet is moved anamount corresponding to another five cents on the dial. In other words,the dial is moved to the zero position. When this occurs, the toe I01 ofcam I01 engages the left hand end of lever I02 rocking the same in aclockwise direction and thereby moving the right hand end thereof awayfrom the arm I00. When this occurs, the biasing action of spring I00 isunrestrained so that the valve II can be moved to completely closedposition.

As soon as the valve 0| is moved to a completely closed position, thelever I00 is eii'ective to retract the slide latch IOI to permit bellcrank lever 02 to rotate to a position in which switch is open. Thiscauses interruption of the energizing circuit to motor 20 so as to stopoperation of the pump. It is to be noted, however, the

30 flow of gasoline ceased as soon as the valve 0| was closed. In thismanner, a much more accurate measurement of the dispensed gasoline isobtained than where the motor alone is shut off when the predeterminedamount of gasoline has been dispensed.

At this stage of the operation, the preselector dial I00 is in theposition where the numeral zero appears behind the window I00 aspreviously explained. The wheels of the registering mechanism ll are insuch a position that the amount of seventy-five cents appears in theamount window. This is the amount for which the preselector dial wasoriginally set. Regardless of what may have been the original setting ofthe preselector dial, the amount indicated in window 40 when thedispensing operationis completed, will be the value for which thepreselector dial was originally set. In other words, the subtractingmechanism is so correlated with the registering mechanism that thesubtracting mechanism moves the dial back to zero simultaneously withthe registering wheels arriving at the desired value.

In order to obtain more gasoline, it is necessary to reset theregistering means. It is impossible to close the switch 00 before thisis done, because of the interlocking mechanism 00. This resetting isrotated through an angle of 360, then 45 further, and then back to the360 position. When this operation is completed, the numerals of theamount and gallonindicating wheels will all be at zero. With the pump ofthe present invention. this movement of the reset shaft performs certainother functions. When the shaft 02 is so moved, the arm I11 carriedthereby is similarly moved and engages the free end of lever I14 to rockthis lever about a pivot. When the arm I11 engages the free end of leverI'll, the resulting rotation of lever I10 causes lever I10 to be rockedupwardly freeing the hook 112 from the pin 161. The combined biasingaction of spring 145 and the springs of the strain release connection168 is then effective to rotate the segment gear 161 in a clockwisedirection (as viewed in Figure 3) until the teeth thereof are inengagement with the teeth of pinion gear 163.

The apparatus is now in position for being operated again. The numeralwheels are all at zero. The teeth of segment gear 161 are in engagementwith pinion gear 163. Let it now be assumed that the customer desires topurchase forty cents worth of gasoline. This involves the depositing inthe coin slots of the machine of coins totaling forty cents. This, ofcourse, can be accomplished by any combination of five cent, ten cent,and twenty-five cent pieces. Let it be assumed that a customer desiresto use a twentyfive cent piece, a ten-cent piece, and a five cent piece.Let it be further assumed that he first deposits the twenty-five centpiece in that coin slide of the coin mechanism 225 which is adapted toreceive a twenty-five cent piece. The coin is deposited in the opening235 and the slide 234 is shoved inwardly. As the slide is shovedinwardly, the lever 241 is rocked in a clockwise direction to rock arm294 and move the tonque 284 of lever 283 out of the spiral track 211,all as previously explained. The spring 284 is thereupon efiective torotate lever 283 back in a clockwise direction until it engages the hubof the disks 210. As the slide is pulled outwardly again, the arm 294 isrocked back upwardly and tongue 284 is allowed to move into the spiraltrack 211 adjacent the hub of the disk 210. This rotation of lever 283tilts switch 280 so that the switch is now closed. As result of theclosure of this switch a circuit is established to field winding 265 asfollows (as shown in Figure 3) from conductor 341, through conductor341, switch 280, conductor 348, field winding 265, and conductors 349and 350 to the other line wire 345. At the same time, an energizingcircuit is established to relay winding 336 as follows: from line wire341 through conductor 341, mercury switch 280, conductors 348 and 351,relay winding 336, and conductors 352 and 350 to the other line wire345. As a result of the establishment of the above circuits, both themotor 262 and the relay 335 are energized.

The energization of the motor 262 results in the disks 214, 215, and 216being driven in a counterclockwise direction along with the spiral disk210. Let it be assumed that the twenty-five cent piece which has beeninserted is a genuine twenty-five cent piece and is not defective in anyway. The

coin will then pass down the tube 231 and will pass through the slugdetector 228 without any delay. The coin will then enter the coin trackformed by rib 306 and disk 216 and will be propelled through this trackby the action of disk 216 which firmly engages the twenty-five centpiece. As the twenty-five cent piece rolls through this track, itsuccessively engages fingers 314, 315, 31 I, 312, and 313. Thesuccessive engagement with fingers 314 and 315 causes the switch 321 tobe closed twice. Each time th'at switch 321 is closed, a circuit isestablished to solenoid winding 210 as follows: from line wire 341through conductors 354 and 355, switch 321, conductors 356 and 351,solenoid winding 210, and conductor 358 to the other line wire 345. Eachtime that such a circuit is established, the solenoid core 201 is drawnto the right so as to cause pawl 213 first to be lowered into the pathof pins 202 and then to engage the pins and rutate the disk 108 thedistance between two pins. It will be obvious that switch 325 isconnected in parallel with switch 321 by conductors 355, 358, 360 and356. Thus, as the twenty-five cent piece successively engages fingers311, 312, and 313, and thus actuates switch 325, the energizing circuitto solenoid 310 is closed three successive times. Thus, the passage 01the twenty-five cent piece through the coin track bounded by rib 306results in the energization of solenoid winding 3'10 five successivetimes to advance the disk the distance of five spaces between the pins.As previously pointed out, the distance between any two pins results inthe dial being moved ahead the distance of five cents on the dial. Thus,the insertion of a twenty-five cent piece causes the dial coupled todisk 108, to be moved to the twentyfive cent position.

After the twenty-five cent piece has passed the last finger, it passesoutwardly into a suitable coin receiving safe 310. At this time, thetongue 284 will have been carried sufficiently far out into the spiraltrack as to rock switch 280 to the position shown in Figures 3 and 5 inwhich the mercury switch is in circuit open position. This causesdeenergization of the motor 262 and the relay winding 335.

During the time relay winding 335 was energized, the switch 339 wasopen. Since, as previously explained, this switch is in the energizingcircuit of motor 25, it was impossible while motor 262 was in operationto cause energization of the motor 25. Since relay 335 is nowdeenergized, it is possible for the pump to be placed in operation asdesired. Since, however, only twenty-five cents worth of gasoline willbe dispensed and it is desired to dispense forty cents worth, thecustomer will wish to deposit further coins.

Let it be assumed that the customer now deposits a ten cent piece in theappropriate slide. When this is done, the lever 241 is again rocked inthe process of inserting the coin with the result that the motor 262 isagain energized for a predetermined period of time. The ten cent piece,if genuine and not defective in any respect, will pass through tube 238,through the slug de-' tector 221, and will enter the coin track boundedby rib 305 and disk 215. In passing through the coin track it willdeflect fingers 311 and 314 causing switches 321 and 325 each to beclosed once. Each time that these switches are closed, the winding 210is energized to advance the dial 100 the distance of five cents. Theresult of the deposit of the ten cent piece following the deposit of thetwenty-five cent piece is that the dial will now assume the thirty-fivecent position.

It will be assumed that the operator now deposits a five cent piece.Even if this deposit is made before the motor 262 has stopped running,there will be no damage since the depositing of the coin willautomatically throw the lever 283 back to the inner portion of the disk210 and insure a full cycle of operation. The five cent piece will passthrough the tube 239 and, if not defective in any respect, through theslug detector 228 and the coin track bounded by rib 304 and the disk214. As the coin passes through this coin track, it engages the finger314 to close the switch 321 and hence energize the solenoid winding 310once. This causes the dial 100 to be further advanced the distance offive cents so that the numeral 40 now appears through the window 103. Assoon as the finger 284 of lever 283 reaches the outer portion of spiraltrack 211 so as to cause deenergization of lever 262 and relay 305, thepump can be placed into operation. This is accomplished by pressing thepush button 35 inwardly against .the downwardly extending arm of bellcrank lever 32 rocking the same in a counterclockwise direction. Suchcounter-clockwise movement of the lever 32 causes switch 30 to be closedto establish the circuit to motor 25 previously traced. As soon as motor25 is thus energized, the pulley 28 is rotated to start operation of thepump. At the same time, the pinion gear I5: is rotated and since thispinion gear is in mesh with the teeth of segment gear IGI, the segmentgear' ISI is rotated in a, clockwise direction until the teeth of thesegment gear have cleared the pinion gear. When this happens, the pivotpin I61 will have passed beyond the line extending between the stubshaft I62 and the pivotal connection of rod I66 with lever I43, so thatthe biasing action of spring I45 is now effective to continuetheclockwise movement of segment gear IIiI. This movement continuesuntil the pivot pin IB'I engages the hook I12, whereupon furthermovement of the segment gear is permitted. The parts will now again bein the position shown in Figure 3. Because of this movement of segmentgear I6 I, during which movement the pivot pin I61 passed through thelowermost possible position, the lever I43 was rocked in acounterclockwise direction to cause a clockwise or valve openingmovement of shaft 84. At the same time, the movement of shaft I44 in acounter-clockwise directionlas viewed in Figure 3) moves the arms I49and I50 to a positionwherein they are held by the levers I5I and I52,the arms riding over the inclined edges adjacent the right hand ends ofthese levers. Had the push button 35 been pushed inwardly. before thepreselector dial was' moved from the zero position, the movement ofvalve shaft 84 to a valve open position would have i had n'o'eflect dueto the fact that there would be;

nothing to holdthe valve open. This is the case, because the toes I55.and I5! of cams I05" and I' I hold'the levers I! and I52 in theirinopera tive position, when the preselector dial is in its zeroposition. As a result allthat would have zero position, the'valv'e. isheld open by.the enin Figure 7. takes the place of switching mechanism229 in the previously described species. The switching mechanism ofFigure 7, as will be clear from the following description, is somewhatsimpler than the switching mechanism 228 and furthermore, is moreadaptable for use of coins 403, or 404, the coin engages the finger 40!pro jecting into that tube and tilts the lever 405 in a clockwisedirection, thereby tilting the mercury switch to closed position. It isto be noted that the lever 405 is mounted so that the weight thereof isonly slightly unbalanced so that a very small force is required to tiltthe lever. It will be further noted that the tubes 4 02, 403, and 404are curved at 40I to facilitate passage of the coin after it has tippedthe lever 405. Thus, each time that a coin is inserted in any one of thetubes 402, 403, and 404, the switch 408 is momentarily closed.

The switch 408 indirectly controls the energization of a motor 4I0. Thismotor-comprises the usual field winding 4 and a rotor H2. The rotor H2is connected to a reduction gear train 3 which is in turn secured to ashaft 4. Secured to this shaft are three disks H5, H8, and 1. Each ofthe disks 4I5, 4| 6, and H1 carries a' plurality of pins 8. The disk H5is shown as having five pins 8, the disk -4I8as having ten pins M8, andthe disk 4". as having twenty pins 4I8. In the particular embodiment ofthe invention described in this specification, each of these pinscorresponds to five cents of the inserted money. Thus, the disk 4I5isintended to be used gagement of arm I48 with the lever I5I' (as shown Iin Figure 3). The various elements aren'owin the position shown exceptfor the particular setting oi. the dial and the registering mechanism.As the gasoline is dispensed, the subtracting ratchet I02 will beperiodically moved one notch until the value of five cents appearsbehind the window I03. Theaction of first moving the valve 8I to aminimum flow p'osition'and then to a complete shut-off. position will berepeated in the manner described with the result'that when forty centsworthof gasoline has been dispensed; the flow of gasoline will beabruptly terminated.

in connection with twenty-five cent pieces, the

disk H6 in connection withfifty cent pieces, and thedlsk 4I'Iinconn-ection with one dollar pieces.

It will be obvious that any other disks with suitably spaced pinsca'n'be provided, if desired. As indicated by'an arrow adjacent the diskM5, the disks-M5, H6, and 4" are driven in a counter clockwise directionby the motor 4 I 0.

Associated with the'disksf4l5, H6, and '4" are switches 420, 42I, and422. These switches are It will beseen that my liquid dispensingmechanism-provides for deliveryof an amountof gasoline dependent uponthe, total value of the inserted coins. Moreover, this is done withoutin any way restricting thetype of coin' insertion means or slugdetecting means which is employed. I

- Species of Figure 7 ,carried by switch carrying arms 423. 424, and425. The arms 42-3, 424,' and 425 are only slightly unbalanced upon,their pivotsso that a relatively small force is required to tilt them ina clockwise direction to closed position. The left hand ends of thelevers 42,3, 424, and ,425 are associated with the pins of therespective disks. Thus, as the disks 4I5, 4I6, and 4H are rotated, eachof the switches 420, 42I, and'422 is tilted for each revolution of thedisks asmany times as there are pins on the disk associated with theswitch. Thus, upon one revolution of disk 5, switch 420 is tiltedfivetimes. Similarly, switch 42I is tilted ten times for each revolution ofdisk H6 and switch'422 twenty times for one revolution of disk In Figure'7 there shown a, modified form of a "inotor driven coin operatedswitch. It is to be understood that this switch mechanism as showncontrolled by a solenoid 442.

- The movement or disks 5, m, and m is Associated with this solenoid-442is an armature 443 which is carried on the left hand end of a lever 444.The lever 444 carries a mercury switch 445, pivoted at a point such thatthe lever is substantially balanced about its pivot point. Thus, thesolenoid is capable of moving the armature 448 up into engagementtherewith. Projecting downwardly from the left hand end of lever 444 isa pin 441 which projects into a notch 448. When the pin described,switch 445 is moved to closed posh tion. As will be explained later, theswitch 445 controls the energization of motor so that upon solenoid 442being energized, the circuit to motor 0 is closed.

Each of the lower ends of tubes 402, 403, and 404 are designed to permitthe exit of the associated coin into a central funnel 450 leading to thecoin receiving safe. Associated with the lower ends of these tubes aresolenoids 451, 452, and 453. Each of these solenoids controls theposition of a mercury switch carrying lever, these levers beingdesignated by the reference numerals 454, 455, and 458. Carried bylevers 454, 455, and 458 are mercury switches 458, 459, and 480. Themercury switches are so positioned with respect to the pivot points 452,463, and 484 of the levers that the mercury switches tend to bias thelevers away from the solenoids. Due to this biasing action of themercury switches and due to the spacing of the armatures from thesolenoid, the solenoids are incapable by themselves of moving theirassociated armatures into engagement therewith. In other words, the mereenergization of one of the solenoids 45! to 453 does not insure that itwill pull its associated armature into engagement therewith. Thus, theenergization of the solenoid alone does not change the circuit closingposition of the respective switch of the switches 458, 459, and 450.Accordingly, further means are provided for aiding the solenoids. Itwill be noted that the left hand end of each of the levers 454 to 458projects into the end of the coin chute in such a way that any coinpassing through the chute will have to deflect this lever in acounter-clockwise direction. Such counterclockwise deflection of thelever will momentarily move the armature into engagement with theelectromagnet. The solenoid is thereupon effective to hold the armatureafter it has been so moved.

Operation of species of Figure 7 The mechanism of Figure 7 is shown inthe position it assumes when no coin is passing through it. Let it beassumed that a twentyflve cent piece is inserted in the tube 239, whichas previously explained, connects with the tube 404. As this twenty-fivecent piece passes finger 401 projecting into the tube, it tilts lever405 to close the switch 408. This closure of switch 408 is maintainedfor a brief interval of time during which the twenty-five cent piece isrolling around the curved portion 40!. As soon as theswitch 408 isclosed, a circuit is established to the solenoid 442 as follows: fromline wire 410 through plained, causing pin 441 to be moved out of theslot 448 and causing mercury switch 448 to'be closed. The moving of pin441 out of slot. 448 causes the disks M5, 4", and 4l1 to be free torotate. The moving of switch 445 to circuit closed position establishesa circuit to the motor 4" as follows: from line wire 410 through conductors 4" and 419, switch 445, conductors 480 and 4", held winding 4, andconductors 482, 488, and 418 back to line wire 418. Motor 0 is thereuponenergized to cause rotation of disks, H5, 4", and 4". The moment thesedisks start to rotate, the slot portion 448 moves from underneath thepin 441 thereby preventing pin 441 from dropping down. This preventsreturn movement of lever 444 and the opening of switch 445. In otherwords the insertion of the coin closes the switch 408 to energize thesolenoid 442. The

energization of this solenoid in turn closes the switch 445 to start themotor and move the disk from affecting the energization of solenoidwinding 2i0.

Thus continuing with the case of a twenty-five cent piece, after thetwenty flve cent piece has passed the lever 405', producing the actionpreviously described, the coin passes further down the tube 404 until itreaches the exit, at which time it engages the left-hand end or lever458. Upon so engaging the left hand end or lever 458, it tilts thislever in counter-clockwise direction causing the armature to be movedintoproximity to the core of solenoid 453. When this happens, thearmature is retained by this solenoid inasmuch as the solenoid is nowenergized by the following circuit established when switch 445 wasclosed. From the line wire 410 through conductors 41!, 419, switch 445,conductors 480, 485, and 488, solenoid 453, conductors 481, 488, 483,and 418 to the other line wire 418. It will be observed that solenoids45l and 452 are connected in parallel with solenoid 453 by conductors490, 502, 49d, 493, 503, and 492. Thus, at the same time that solenoid453 is energized by the closure of switch445, solenoids 45l and 452 arelikewise energized. Due to the fact that the solenoids are unable toattract the armature unaided, only those switches will be closed,however, in which the coin has passed through the associated chute.Thus, if a twenty-five cent piece is the only piece that has beeninserted at a given time, the arm 458 will be the only one that istilted into a position at which the solenoids can attract the armature.Thus, the mercury switch 480 will be the only one that is closed. Aspreviously indicated, the mercury switches 458, 459, and 480 control theconnection of switches 422, 42l, and 420, respectively, with thesolenoid 208. Thus, the circuit between the solenoid winding 2i0 and theswitch-420 is as follows: from line wire 410, through conductors 504,505, and 494, switch 420, conductor 495, switch 480, conductors 498,491, and 498, solenoid winding 2i0, and conductor 499 back to the linewire 418. Inasmuch as switch 480 is closed, this circuit is closed eachtime that switch 425 is closed or, in other words, each time that the am423 is engaged by one of the pins 4i! of disk 4|5. As previouslyexplained, since there are live pins 4" on disk "5, the switch 420 willbe closed five times in connection with the passage of the coin throughthe apparatus.

The motor ,4" will continue to revolve the disk "5 until such time asthe notch 445 again comes under the pin 441. Inasmuch as the solenoid isonly momentarily energized, it exerts no attractive force on armature443 and as soon as the slot 446 does come into the position-justmentioned, the pin 441 will drop down in this slot rocking the lever 444in a counterclockwise direction and thereby causing the opening ofswitch 445. The opening of switch 445 automatically deenergizes themotor 4" and the solenoid 4". The locking of pin 448 prevents anyovershooting when the motor 4|ll closes. Thus, when the disk hascompleted its rotation, it is instantly stopped and the motor drivingthe same is at the same time deenergized.

It is believed unnecessary to describe in detail the operation inconnection with the fifty cent and dollar pieces. When a fifty centpiece is inserted, it tilts the switch 408 in the manner which has beenpreviously described in connection with twenty-five cent pieces. Thesame sequence of operationis initiated whereby the disks are placed inmotion. In this case, the fifty cent piece tilts the lever 455 causingthe switch 459 to be closed. As a result of the closure of this switch,the pulsations of switch 42! are the ones which control the energizationof solenoid winding 2l0. 'Due to the fact that there are ten pins 4l8 ondisk 6, the solenoid-winding will be energized ten times. When, on theother hand, a dollar coin-is inserted in the machine, the switch 458will be closed and inasmuch as this switchis in circuit with switch 422,it is the switch.422.that controls the current to sole noid winding 2").In this case, the winding 2! will be energizedtwenty times correspondingto the twenty five cent divisions in a dollar.

The species of Figure 7 has the advantage that it is capable of beingadapted to coins of almost any denomination. -It will be readilyobserved that-all that it is necessary to do is to change the number ofpins 8 in connection with the disks 5, 416, and 4H.

' Species of Figure 8 In Figure 8, I have shown a further motor drivenmeans for setting dial I00. Inthe two previously described species, apawl is associated with a pin disk secured to shaft lill and this pawlis actuated by a solenoid which is period ically energized in accordancewith the value of the coins inserted. In the present species, a

motor is connected through releasable clutch means to the dial and thismotor is continuously energized until the dial is set at the valuecorresponding to. the value of the coin inserted.

Referring specifically to Figure 8, the reference numeral 525 isemployed to indicate a motor which sets the dial Hill; This motor whichmay be of the ordinary induction type, comprises a rotor 525 and awinding 521. The rotor-has secured thereto a worm gear 525. The wormgear 529 meshes with a worm wheel gear 550 which has associatedtherewith a spur gear 5" of smaller diameter meshing with a spur gear532 of larger diameter. The worm gear 529 and the gears 53., Ill, and532 form a speed reduction mechanism between the 'rotor I25 and a collar534 secured to gear 552. The collar 584 is rigidly secured to gear 552so as to be movable as a unit therewith. The collar ll4 and gear 532 arefreely mounted on a shaft 455. The left hand face of collar 554 isserrated to cooperate with serrations on the right hand face of a collar55]. The collar 531 is associated with a sprocket wheel III and afurther serrated collar 538. The sprocket wheel 53. is connected bymeans of a sprocket chain 546 to a sprocket wheel associated with dialill. The sprocket wheel 555 and the collars 551 and 555 are securedtogether as a unit and are also freely mounted on shaft 535. Theserrated collar 535 is adapted to cooperate with a serrated collar 54]which is secured to a disk 542. The disk 54! and the collar 5 arelongitudinally slldable on shaft 536, the sliding movement being limitedby a pin 551 secured to shaft 535 and projecting through a slot 555 incollar 5.

The serrated disks 534 and 531 have opposing recesses 542 and 543designed to receive a coil spring 545. The purpose of the coil spring isto bias the collars 534 and 531 apart and thereby prevent engagementbetween the teeth of the respective collars. A similar spring 548 islocated between collars 535 and 54L It is to be understood that thesecollars are similarly provided with opposing recesses to receive thespring 545.

' Cooperating with the collar 542 is a further unit comprising a lever544. This lever is pivoted at 545 at its lower end and carries twonipples 545 and 545. The nipples are designed to engage the disk 542when lever 544 is moved in a clockwise direction.- A collar 54'! securedto lever 544 and freely slldable on shaft 555 guides this movement oflever 544. The lever is operatively connected to a solenoid core 555 ofa solenoid 55!. a winding 552. Upon energization of solenoid winding552, the core 550 is moved to the right. This action is opposed by aspring 554. .It will be obvious that whenthe upper 'end of lever 544.ismoved to the .right, the disks 5, 538, 531, and 534 are moved together;so that the teeth thereof are brought into mesh. Under these conditions,the rotation of collar 534 by the motor 525, will cause the rotation ofcollars 554, 531, 535, and 5".

The pin and slot connection comprising pin 55'! and slot 555 permits thelongitudinal movement of collar 54! necessary to clutching anddeclutching the collars 534, 531, 538, and 5 but prevents rotation ofshaft 436 relative to collar 54L Thus, upon collar 5 being rotated, theshaft 536 is similarly rotated.

Secured to the shaft 536 are three disks 550, 56!, and 562. The disks560, 56!, and 562 are all rigidly secured to shaft 536 so that uponrotation of shaft 556, the disks are correspondingly rotated. Each ofthe disks has a lug secured thereto, the lugs being designated by thereference characters 564,555, and 565, respectively. These lugs aredesigned to cooperate with mercury switch carrying levers 568, 569, and510. These levers carry mercury switches 5H, 51!, and 513, respectively.Switches 51!, 512, and 513 arenormally in a circuit closed position.Upon the lug engaging the downwardly extending arm of one of the switchvcarriers, however, the corresponding-switch is tilted to circuit openposition. The lugs 554, 555, and 565 are so spaced on their respectivedisks that they engage the downwardly extending arms of the associatedAssociated withthe core in is' switch carriers when the preselectingdial reaches the twenty-five cent, the fifty cent, and the dolgage lug564 and limit return movement of the shaft 586. The shaft is biased by ahelical spring 511 surrounding and secured to shaft .536 at one end andsecured to a fixed member 518 at its other end.

A plurality of conventional coin receiving tubes are provided, one foreach of the coins for which the machine is adapted to receive. In theembodiment described in Figure 8, the machine is adapted to receivetwenty-five cent, flfty cent, and one dollar coins. Any suitable slugdetecting mechanism may be provided. The slug detecting mechanismincorporated is substantially the same as that of the species of Figures1 to 6. At the lower end of each of the coin receiving tubes, I providea relay armature actuating means which has been illustrated only inconnection with the dollar coin. Closing off the tube at a predeterminedpoint is a gate 580. This gate is adapted to be swung outwardly througha slot adjacent thereto by any suitable automatic means 7 as will bementioned later. Upon the coin reaching this gate, its further progressis stopped. Associated with the tube immediately above this gate is alever 58! which is pivoted at 582. The outer arm of this lever isconnected with a rod 583 connected with an inwardly-projecting arm of abell crank lever 594' pivoted to the casing l2. Cooperating with thebell crank lever 584 is a push button 585 which projects through thecasing I2. Upon push button 585 being pushed inwardly, the bell cranklever 584 is rocked in a clockwise direction to move rod 583 upwardly.The bell crank lever 58! has an upwardly extending arm provided with acoin engaging portion adapted to extend through a slot in the coin tubeadjacent the coin which has been indicated by the reference numeral 586.Opposite the slot through which the coin engaging portion of lever 58lextends is a further slot into which extends a pusher disk 581. Thepusher disk 581 is connected through rod 588 to an armature 589cooperatively associated with a relay coil and core 590. The relayarmature 589 carries a pair of mercury switches 59 I and 592. Theseswitches are shown in their circuit open position. When the armature 589is moved into engagement with the relay 590, the two switches 59l and592 are moved to circuit closed position. As will be explained later,upon the armature being so moved, the closure of switches 59! and 592causes a holding circuit to be established to the relay coil 590. It isto be noted that the coin 581 in effect forms a link in the means foractuating the armature 589 by means of push button 585. Thus, unless acoin is present in the space between the coin engaging portion of lever58l and the pusher disk 581, the actuation of button 585 has no effectupon the magnet.

It is to be understood that a similar armature actuating means isprovided in connection with each of the coin receiving tubes. Forpurposes of simplicity, only the relays and the armatures have beenshown in connection with the coin receiving apparatus for the othercoins. The relay 594 is provided with an armature 595 which armaturecarries mercury switches 596 and 591. These switches are normally incircuit open position but upon the armature being moved into engagementwith the electromagnet, both of these switches are closed. The armature.595 has connected thereto a rod 599 which, it will be understood, isassociated with apparatus similar to that with which rod 588 isassociated.

Similarly, relay 600 cooperates with an armature 60!, which carriesmercury switches 602 and 603. Similarly the armature GM is connected toa rod 605 which is designed to cooperate with suitable actuatingmechanism such as is shown in connection with the dollar coin mechanism.

The mechanism for actuating the gates 580 may take any suitable desiredform in which means are provided for automatically opening these gatesafter an operation initiated by the insertion of the coin has beenstarted. Thus, the gate may be opened by means driven by motor 525 or bythe meter l8.

Secured to shift l0l are three stop disks 605, 606, and 601. The purposeof these stop disks is to insure that the dial I00 stops exactly at thedesired position. While, as will be explained later, the mechanism isdesigned to deenergize the motor 525, and to declutch the disks 560,56l, and 562 when the dial I00 has reached the desired position, it ispossible in some cases for there to be a slight amount of over traveldue to wear of the mechanism. In order to prevent this and to insurethat the dial stops at exactly the desired position, the stop disks 605,606, and 601 are provided. Each of these stop disks carries a lug, theselugs being designated by the reference characters 609, H0, and 6. It isto be noted-that these lugs are secured to the disks at differentangular positions. These positions correspond to the desired rotation ofdial I00 for the various denominations of coins to be inserted.Associated with each of the stop lugs 609, M0, and 6 is a stop arm,these arms being designated by the reference numerals H3, H4, and M5.Only the stop arms H3 and 6| 5 have been illustrated in detail. It willbe noted that the stop arm 6l3 is pivoted at 6". The upper end of thearm H3 is connected by a link BIB to a solenoid core 6l9 with which isassociated a solenoid winding 620. It will be obvious that uponenergization of the solenoid winding 620, the core H9 is moved to theleft, thereby rocking the stop lever H3 in a counter-clockwise directionto the dotted line position in which the right hand upturned end of thestop lever 6| 3 is in the path of the stop 609. As will be explainedlater, the winding 620 is energized when the relay cell 600 isenergized. Relay coil 600 is energized only when a twenty-five cent coinis inserted. It will be obvious therefore, that the stop lever H3 is inits motion arresting position only when a twentyfive cent coin has beeninserted.

In order to simplify the" description, the sole noid actuating mechanismfor stop arm 6 has not been illustrated. This solenoid mechanism,however, corresponds to that previously described in connection with armH3 and comprises a solenoid winding energized whenever the relay 594 isenergized.

The actuating mechanism of stop lever H5 is shown as comprising a link622 connected to a solenoid core 623; Associated with the solenoid coreis a solenoid winding 624. of lever 6I3, energization of the solenoidcauses the lever M5 to be rotated in a clockwise direction into the pathof the stop 6. The solenoid 624 is connected in parallel with the relay590 so as to be energized whenever this relay is energized, or, in otherwords, to be energized whenever a dollar coin has been inserted.

As in the case Operation species of Figure 8 The subtracting mechanismis operating to pe-,

riodically retract this dial until the valve is completely closed andthe. pump, motor is stopped.

Let it now be assumed that a purchaser desires to purchase a dollarsworth of gasoline. In

this event, a dollar coinis inserted in the-proper coin receiving tubedesignated in the drawings by the reference numera1'519. The coin isstopped inits passage by the gate 555 and the push button 585 is thenpushed inwardly to move thecoin,

which is-designated by reference numeral 555, to the left to movethearmature 589'into engagement with the coil 595. This movement of thearmature causes switches 59! and 592 to be closed, as previouslyexplained. The closure of switches 59! and 592 causes a. holding circuitto be established to relay coil 595 as follows: from lineiwire 535through conductor 53!,.switch 59!. conductor 532, switch 513, conductors534 and 635, switch 592, conductor 535, relay coil 59!], and conductors531, 538, 539, 51!, 645, and 54! back to the other line'wire 543. Theenergization of relay coil 595 by the circuit just traced causes therelay coil to hold the armature in engagement therewith even after thebutton 585 is released and the coin is allowed to pass on through thetube by the opening of the gate 585.

As previously indicated, each of the solenoid windings of the solenoidswhich actuate arms 5l3 to H5 is connected in parallel with theassociated relay. Thus, at the same time a circuit is established torelay-:coil 595, a circuit is estaby lished to solenoidwinding 524 asfollows: from line wire 535 throug-li conductor 53!, switch 59!,

conductor 6'32, switch 513, conductors 534 and 535, switch 592,conductors 535 and; 553, 'relay coil 524',fland conductor's- 554, 539,51!",1545; and 54! .back to the-other; line wire,5 43.' 'Thus, at thesame time relay 5951s energized,- solenoidwindhigher numbers behind thewindow.

dial I55. The-preselector dial is rotated in a clockwise direction so asto bring successivel Movement of the preselector dial is terminated bythe engagement of stop arm 5!5 with stop lug 5!!. It will be recalledthat this arm M5 was moved into the path of lug 5!! at the same time asthe relay coil 595 was energized.

At just the instant that the stop lever 5l5 engages the stop lug 5!!,the lug 555 of disk 552 engages the downwardly extending arm of theswitch carrier 515. The result of this is that the switch carrier istilted in a clockwise direction moving mercury switch 513 to circuitopen position. It will be recalled that switch 513 was in the circuit ofthe motor field winding 521 and the solenoid winding 552 as well as thatof the relay 595 and the stop actuating solenoid 524.

Thus, at the same time that further movement of preselector dial I55 isstopped by the engagement of the stop lever 55! with stop lllg 5! I, thesolenoid 55!, the relay 595, and the solenoid winding 524 are alldeenergized. The deenergization of the solenoid 55! results in thedeclutching of shaft .535 and sprocket wheel 539 from motor 525. It isvery important that these be declutched so that the preselector dial isfree to turn through the action of the subtracting mechanism. It is tobe recalled that it is necessary for this subtracting mechanism toperiodically retract dial I55 and if some declutching means were notemployed, the subtracting mechanism would be ineffective.

The deenergization of relay winding mmsures that switches 55! and 552are moved to open position to require the insertion of a further 1 cointo cause their reclosure. g I As soon as the solenoid 55 is deenergizedso as to result in a declutching of shaft 535, the coil spring 511 iseffective to immediately rotate shaft 535 in a clockwise direction untilthe lug 554 engages the stop 515. This is desirable because the diskshouldbe returned to the stop position to be.

- ready for the insertion of another coin.

mg 524is energized to mov e the1rig'ht hand end of stop arm 5l5 into1thelbathof movementvof st oplug5!.!. I A

The closure .of switch 5st also este nsnes e If the operator desires, topurchase only twenty five cents worth-of gasoline, atwenty-flve centcoin is inserted and by means of a suitably actuated push button-notshown, the armature 55! is moved into engagement with thezelectromagnetcircuit to. motor .525 as follows: from line i'wire',

535 through conductor53!,'switch 59!, conductor m; switch513,'con'ductqrs sat-mans, 541 and 545, field winding 521, "andconductors 549, 555, I

- and 54! back to the'other line wire. 543;'. The,,' establishment ofthis circuit causes energization of 1555., When this happenaswitches 552and 553 are closed. The'closureof these switches results in theestablishment of an energizing circuit to motor field winding 521 asfollows: from line wire motor 525 and the consequent rotation ofthe geara train including worm 529 and gear 532.' I

Itwill'be noted that the solenoid winding m is connected inparallel withthe motor field windin'g'521 by conductors 545, 549, 55!, and, 552.

Thus, at the same time that motor field winding 521 is energized,solenoid winding 552 is also en-'- a ergized.

The energization of, solenoid winding 55! simultaneouslywith that ofmotor field winding 521 causes collar 54!.1 to be moved to the rightintoengagement withcollar 535 and collars 531 and 534 to be moved intoengagement with each other.

The result'of this isthat the rotation-of motor 525 is imparted'to shaft535 causing the disks 555, 55!, and 552 to beturned in a countersults inthe establishment of an energizing circuit through the solenoid $555 asfollows: from the clockwise direction as viewed. in Figure 8. The

sprocket wheel 539 isa'lsorotated so as torotate through the. sprocketchain' 545 the preselector 535-through conductors m and 552,'switch m,conductor 553, switch 51!, conductors '554, 541,

and 545, motor field winding 521, and conductors 549, 555, and 54!back-to the other line wire 543.

At "the same time, an energizing circuit is established to the solenoidwinding .552 whichiscon nected in parallel with motor field winding 521.

"The closure of switches 552 and 503 also .re-

line wire'535 through conductors 55! and 552,

switch'5'52, conductor 553, switch 51!, conductors 554, 545, 555,551,and 515, switch 553, conductor 515, solenoid 555, and conductors 515,51!,

545, and 54! to the other line wire 543. The establishment of the lastcircuitalso establishes a circuit to solenoidwinding 525 which .isconnected in parallel with the solenoid 555. It will be obvious that theoperation is the same except with stop lug 555 that terminates movementof 'that'it is now the engagement of stop arm 5l3 pres-elector dial !55.Similarly, it is the engagement or the lug I" with the downwardlyextending arm of switch carrier I" and the resultant tilting of switchI'll to circuit open position which deenergizes the solenoid I20, thesolenoid l", the motor 525, and the solenoid I. I

When a fifty-cent coin is inserted, it is thearmature 595 which ispushed into engagement with the electromagnet 591 and it is the switches"l and 591 which are closed. In this case, the energization circuit tothe motonileldwinding llt is from line wire 630 through conductors "Iand $13, switch 596, conductor I'M, mercury switch 512, conductor 56Band from that point on, the same as in the previously traced circuitsfor motor 525. The circuit to the electromagnet winding 594 is from linewire 630 through conductor SSI and B13, switch 698 conductor Ill, switch512, conductors $61 and 888, switch 591, conaces ,5

from the dial so as not to interfere with the operation or thesubtracting mechanism.

While I have shown certain specific embodiments of my invention forpurposes of illustration. it is to be understood that the inventionislimited only by the scope or the appended-claims.

I claim:

1. In combination, a liquid flow line, a pump for supplying liquid tosaid flowline, a meter for measuring the liquid passing through saidflow line, registering means for indicating thepassage of liquid throughsaid flow line, a valve .in said flow line, preselector means controlledby ductor 8B9, solenoid winding B34 and conductors 633, 639, SH, 850,and l'to the other line wire 643. Since the solenoid iwinding not shown)associated with stop arm 8 is connectedxin parallel with the solenoid594, the stop arm [it will be moved into stopping position when theelectromagnet 594 is energized. It is believed that the action in thiscase is otherwise obvious from the description in connection with theinsertion of a dollar and twenty-five cent pieces.

It will be seen that in this embodi'ment, provision can be made for anydenominations of coin. All that is necessary to ,dois to provide thevarious stops in necessary locations with respect to their dials.

When the stop mechanism comprising arms M3, Bill, and BIS is employed,itwill'be obvious that the preselector dial can be set at a positioncorresponding only to the value of due coin. In other words, the machinecannot beset for the cumulative value of several coins. In many cases,this ofiers no objection whatsoever. This is particularly true with themachine of the type described and which is adapted to receivetwenty-five, fifty and one dollar coins. In such cases, this amount ofgasoline is usually sufllcient. However, where it is desired that the.machine operate in accordance with thecumulatlve value of a plurality ofcoins, the, stop mechanism-comprising arms H3. H4, H5 can ,beeliminated;

The only restriction which is then necessary to 0 place upon the user isto insure that the preselector dial has been advanced'to'a valuecorresponding to the valueof the previously inserted coin before anothercoin is placedin themechine. If this is done, the preselector dial canbe advanced to any position corresponding to the cumulative value of alarge number of coins inserted in the machine.

From the foregoing description, it will. bev seen that I have providedin a gasoline vending pump of the type employing a preselector dial andsubtracting mechanism for periodically .retardlng this preselecting dialuntil a, valve is closed, motor means for setting this preselecting dialand means for automatically controlling the operasuch that the motor isnormally disconnectedsaid registering means for maintaining said valveopen until a predetermined amount 'of liquid is indicated, saidpreselector means including indicating means adapted to be set to apredeterminedselected amount and subtracting means driven by s'aidregistering means for returning the indicating means to a predeterminedposition in uniform increments corresponding in magnitude, to apredetermined monetary sum. an electric motor means, means foroperatively connectingsaid motor means to said indicating xn'eansand'eiljective upon energization of said motor to adviance saidindicating means an amount corresponding to one of said increments,means for receiving any one of a plurality oi predetermineddenominations of coins, means operative to energize said motor meansperiodially. a number of times equal to the valueof .any insertedcoindivided by said predetermined monetary sum so as to cause said motor to.set

said indicating means to an amount correspond- .ing to the value of saidcoin, said registering means and being effective to drive saidsubtracting means in such a manner that when said indicating meanshasreached said predetermined position, the registering means hasreachedthe 4o predetermined amount.

2. In combination, a liquid flow line, a pump for supplying liquid tosaid flow line, a meter for measuring the liquid passing through saidflow line, registering means for indicating the passage of liquidthrough said flow line, a valve in said'fiow line, preselector meanscontrolled 'by said registering means for maintaining said valve openuntil a predetermined amount of liquid is indicated, said preselectormeans includ ing indicating means adapted to be set to a predeterminedselected amount and subtracting means driven'by saidfregistering meansfor returning the indicating means to a predetermined position inuniform increments corresponding in magnitude to a predeterminedmonetary sum, an electric motor means, means for operatively ,connectingsaid motor means to said indicating means and effective uponenergization of said motor to advance said indicating means an amountcorresponding to one of said increments, means operative each time thatsaid motor, is deenergized to render said connecting means ineilectivcso as to leave said indicating means free for movement independently ofsaid motor means, means for receiving any one of a plurality of erajtiveto energize said motor means periodically. a number of times equal tothe value of any inserted coin divided by said predetermined monetarysum so as to cause said motor to set saidindcating means to an amountcorresponding. to the value of said coin, said registering means beingeiIective to drive said subtracting means in such a manner that whensaid indicatingmeans has reached said predetermined position, theregistering means has reachedthe predetermined amount.-

